doc: Update more information about FIPS selftests and algorithms
* doc/gcrypt.texi: List implemented GOST curves. Update location of the HMAC selftests and add SHA3 ones. Add information about ECC selftests. Add information about KDF selftests. Update information about additional MAC selftests. Update ifnromation about FIPS allowed algorithms.
- Signed-off-by: Jakub Jelen <email@example.com>